Thermostatic switch.



N0. 683,l86. Patented Sept. 24, I90l. W. F. SINGER.

THERIOSTATIC SWITCH.

(Applimtiol flled Inn. 1 '1001.

3 Shanta-Shut I.

(In lodol.)

WITNESSES.

lNvENTOR.

m: Noam mun co, morouma. wumnam. a c.

No. 683,l86. Patented Sept. 24, I90l.

W. F. SINGER.

THERIOSTATIC SWITCH.

(Lpphcflwn mm 3m 14 won (In Iodel.) 3 Shuts-Sheet 3.

I ll INVENTOR.

WlTNESSES.

UNITED STATES PATENT OFFICE.

WILLIAM F. SINGER, OF NE\V YORK, N. Y., ASSIGNOR TO THE SINGER AU- TOMATIC ICE MACHINE COMPANY, OF JERSEY CITY, NEW JERSEY.

THERMOSTATIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 683,186, dated September 24, 1901.

Application filed January 14, 1901. Serial N5. 43.287. (No model.) I

To all whom it may concern.-

Be it known that I, WILLIAM F. SINGER, a citizen of the United States,residing at Fourth avenue and Twenty-eighth street, New York city, New York, have invented a new and useful Improvement in Thermostatic Switches, of which the following is a specification.

My invention relates to devices in which a machine is started and stopped or otherwise regulated by means of a thermostat. It is intended to provide such a connection between the thermostat and the machine as will work positively and will not be affected by accidental vibrations of the thermostatic index or the like.

I have illustrated in the accompanying drawings a form of my device adapted for use in refrigerating systems.

Figure I is an elevation, partly conventionalized, of my device as a whole. Fig. II is a front view of the thermostat; Fig. III, a section of the same through the line a; as, Fig. II. Fig. IV shows the same with the faceplate removed. Fig. V is a back view of the face-plate. Fig. VI is a view of the circuit make and break device with its front cover removed. Fig. VII is a view of the switch. All the partial views are on an enlarged scale.

1 designates the case of a thermostat, which is of course situate within the cool room or place where refrigeration is required. WVithin the case 1 is an ordinary thermostatic compound bar 11, properly geared to the indexhand 12. side insulated from the plate and from each other two metal arcs 14 15, each pierced with a plurality of holes 17. Metal spring-buttons 18 19 press against the arc-shaped strips 14 15, respectively. Binding-screws 102 104 103 are electrically connected, as shown, with the hand 12 and strips 14 15, respectively. Metal plugs 141 151 are adapted to enter and frictionally engage in any of the holes 17.

2 designates the case of an electrically-controlled spring-movement, in which is an electric magnet 21, whose armature 22 is pivoted at 221, provided with aspring 222, acting adversely to the magnet 21, and with a finger 223 and detent 224. A coiled spring 23 on a frame 24 is geared to rotate the disk 25, which is provided with insulating-wings 251 and Aface-plate 13 has on its inner ings.

notches 252. A toothed wheel 26 is geared to the disk 28 and is engaged by the detent 224. An arm 27, insulated from the frame 24 by means of the block 271, is pivoted at 272 and provided with a lug 273, adapted to ride on the wings 251, and thereby make and break contact between the tip 274 of the arm 27 and the disk 25. Binding-screws 201 202 are electrically connected with the ends of the coil of the magnet 21. Other binding-screws 204 and 207 are connected, respectively, to the frame 24 and the arm 27.

31 32 are switch-blades mounted on an insulating-block 311,by which theyare connected to a soft-iron core 312, which is adapted to reciprocate alternately into and out of the helices 33 331. The blades 31 32 are adapted to engage with switch-sockets 314 315 324 325. Arms 316 326 on the blades act to raise 7o levers 35 36. Lever 35 plays between contact-points 351 352. Lever 36 drops onto contact-point 361. For the sake of clearness the various supports of the parts are omitted from the drawings.

4 is a motor, which in practice is connected to the gas-compressing pump of a refrigerating system.

5 is an ordinary open-circuit battery.

The wires connecting the various parts of the device are indicated as follows: 6 61, main lines from dynamo, ending in sockets 314 324; 62 63, from switch-sockets 315 325 to motor 4; 64, from screw 102 through battery 5 to screw 201; 65, from screw 104 to point 351; 8 66,from screw 103 to point 352; 67, from screw 202 to lever 35; 68, from screw 204 to line 6;

69, from screw 207 to top of coils 33 and 331; 610, from lower end of coil 33 to contact 361; 611, from line 61 to lever 36; 612, from lower end of coil 331 to socket 315.

The operation of the device will be readily understood from an inspection of the draw- As shown in Fig. I, the motor 4 is quiescent. As the temperature of the cool 5 room in which the thermostat is placed rises the bar 11 responds and the hand 12 turns to the left. 'VVhen the limit of toleration regulatable by the placing of the plug 141 in oneof the holes 17 is reached, the hand 12 touches the plug 141. The electric circuit thus closed includes case 1, hand 12, strip 14, line 65,

point 351, lever 35, line 67, coil of electromagnet 21, line 64, including battery 5; The battery current energizes the magnet 21, so that the armature 22 is attracted and the finger 223 and detent 224 both disengaged. The coiled spring 23 then acts to rotate the disk25. When the wing 251 clears the lug 273, the arm 27 contacts with the disk 25, thereby closing a circuit comprising the frame 24, lines 68 6, dynamo, (not shown,) lines 61 611, lever 36, point 361, line 610, coil of spool 33, and line 69. Thus the coil 33 is energized from main line, the core 312 drawn upinto the coil, and'tlie switch-blades 32 31 connected with the sockets 324 325 and 314 315, respectively, whereby the main line is connected to the motor 4, thereby starting the motor and attached gas-com pressing pump. When in consequence of this refrigerating action the temperature of the cool room falls to a predetermined degree, denoted by the position of the plug 151 in the series of holes 17 in the strip 15, the indexhand 12, touching the plug 151, closes a circuit, compressing strip 15, line 64, coil of magnet 21, line 67, contact 352, and line 66.

It is clear that the previous closing of the switch has by means of the finger 316 raised the lever 35 in contact with the point 352. As before, the magnet 21 is energized by local battery 5, the armature 22 attracted, and the spring movement freed. This again acts to contact the arm 27 with the disk 25, closing a circuit consisting of arm 27, line 69, coil of helix 331, line 612, socket 315, line 62, motor in said line, electrically-actuated switch-op? erating mechanism adapted both to close and 4, line 63, socket 325, blade 32, line 6'1,dynamo, lines 6 68, and frame 24. Main-line current now energizes coil 331,'the core 312 is drawn downward, the switch-blades 31 32 withdrawn from their sockets, and the motor 4 stopped.

It will be noted that the use of the battery 5is momentary. In the first-described action when the switch is closed thearm 326' lifts the lever 36 from the point 361, thus breaking the circuit. In the reverse action the dropping of the lever 35: by reason of the downward movement of the arm 3-16 similarly breaks the circuit. In both cases the break denergizes the magnet 21, thearmature 22 is drawn back by the spring 222, and a half- 223 to drop into one of the notches 252, whereby the detent 224 is engaged with a tooth of the wheel 26 and the arm 27 held out of contact with the disk 25 until the next contactof the hand 12 with one of the plugs on the disk 13 again makes one of the circuits already described.

By the term main line, as used in the claims, I wish to be understood as referring to a line leading from any source of electric energy, as a dynamo, to the motor.

What I claim isr 1. In combination, motor, main line, switch in said line, electrically-actuated switch-operating mechanism, device for completing cir erating mechanism, v i of energy, said switch-operating mechanism and circuit-closing device and thermostaticcuit whereby said switch-operating mechanism is'energized and thermostat electrically connected with means for releasing said circuit-completing device, substantially as described.

2. In combination, motor, mainline, switch in'said line, electrically-actuated switch-op erating mechanism, independently-actuated device for completing circuit whereby said switch-operating mechanism is energized and thermostat electrically connected with means for releasing said circuit device, substantially as described.

3. In combination, motor, main line, switch in said line, electrically-actuated switch operating mechanism, device for completing cir cuit whereby said switch-operating mechanism is energized, thermostat electrically connected with means for releasing said circuitcompleting device and means for breaking the local circuit between said thermostat and said releasing means when said switch is closed or opened, substantially as described.

4. In combination, motor, main line, switch in said line, electrically-actuated switch-op= erating mechanism, device for completing circuit whereby said switch-operating mechan ism is energized, thermostat electrically con nected with means for releasing said circuitcompleting device, and means for breaking the circuit between said switch operating mechanism and its source of energy when said switch is closed or opened substantially as described.

5. In combination motor, main line, switch to open said switch by a positive movement,-

means for completing circuit whereby said 1 switch-operating mechanism is energized and thermostat'electrically connected with said circ'uit-eompletin g me'ans,substantially as de-' scribed.

6. In combination motor, main line, switch insaid' line, electrically-actuated switch-op circuit including source ally-actuated means for operating said circuitrclosin-g device,substantially as described.- revolution of the disk 25 permits the finger 7. In combinatiommotor, main line,switch in said line, electrically-actuated switch-op erating mechanism, of energy, said switch-operating mechanism and independently-actuated circuit -closi'ng' device and thermostatically-actuated means for releasing said circuit-closing device, substantially as described. 7

8. In combination, motor, main line,switch' in said line, electrically-actuated switch-operating mechanism, circuit including source of energy, said switch-operating mechanism and circuit-closing device and thermostatically-actuated means for operating said circuit-closing device,substantially as described.

9. In combination, motor, mainline, switch circuit including source rid in said line, electrically-actuated switch-opof two different circuits between said thererating mechanism, circuit-closing device mostat and said circuit-closing device, sub- I0 whereby said switch-operating mechanism is stantially as described. energized, thermostat, threewire connection T 5 between said thermostat and said circuit- 1 VILLIAM SIB closing device and a subsidiary switch as 35 Witnesses: operated bysaid main-switch-operating mech GEO. L. COOPER, anism and adapted to alternately form part ELLA H. COOPER. 

